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[net-next,v4,1/3] dt-bindings: net: dsa: Add Airoha AN8855 Gigabit Switch documentation

Message ID 20241108132511.18801-2-ansuelsmth@gmail.com
State Not Applicable
Headers show
Series net: dsa: Add Airoha AN8855 support | expand

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Commit Message

Christian Marangi (Ansuel) Nov. 8, 2024, 1:24 p.m. UTC
Add Airoha AN8855 5 port Gigabit Switch documentation.

The switch node requires an additional mdio node to describe each internal
PHY absolute address on the bus.

Calibration values might be stored in switch EFUSE and internal PHY
might need to be calibrated, in such case, airoha,ext-surge needs to be
enabled and relative NVMEM cells needs to be defined in nvmem-layout
node.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 .../bindings/net/dsa/airoha,an8855.yaml       | 242 ++++++++++++++++++
 1 file changed, 242 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/dsa/airoha,an8855.yaml

Comments

Rob Herring (Arm) Nov. 12, 2024, 2:56 p.m. UTC | #1
On Fri, 08 Nov 2024 14:24:14 +0100, Christian Marangi wrote:
> Add Airoha AN8855 5 port Gigabit Switch documentation.
> 
> The switch node requires an additional mdio node to describe each internal
> PHY absolute address on the bus.
> 
> Calibration values might be stored in switch EFUSE and internal PHY
> might need to be calibrated, in such case, airoha,ext-surge needs to be
> enabled and relative NVMEM cells needs to be defined in nvmem-layout
> node.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> ---
>  .../bindings/net/dsa/airoha,an8855.yaml       | 242 ++++++++++++++++++
>  1 file changed, 242 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/dsa/airoha,an8855.yaml
> 

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/net/dsa/airoha,an8855.yaml b/Documentation/devicetree/bindings/net/dsa/airoha,an8855.yaml
new file mode 100644
index 000000000000..8ea2fadbab85
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/dsa/airoha,an8855.yaml
@@ -0,0 +1,242 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/dsa/airoha,an8855.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN8855 Gigabit switch
+
+maintainers:
+  - Christian Marangi <ansuelsmth@gmail.com>
+
+description: >
+  Airoha AN8855 is a 5-port Gigabit Switch.
+
+  The switch node requires an additional mdio node to describe each internal
+  PHY relative offset as the PHY address for the switch match the one for
+  the PHY ports. On top of internal PHY address, the switch base PHY address
+  is added.
+
+  Also the switch base PHY address can be configured and changed after the
+  first initialization. On reset, the switch PHY address is ALWAYS 1.
+
+properties:
+  compatible:
+    const: airoha,an8855
+
+  reg:
+    maxItems: 1
+
+  reset-gpios:
+    description:
+      GPIO to be used to reset the whole device
+    maxItems: 1
+
+  airoha,ext-surge:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Calibrate the internal PHY with the calibration values stored in EFUSE
+      for the r50Ohm values.
+
+  '#nvmem-cell-cells':
+    const: 0
+
+  nvmem-layout:
+    $ref: /schemas/nvmem/layouts/nvmem-layout.yaml
+    description:
+      NVMEM Layout for exposed EFUSE. (for example to propagate calibration
+      value for r50Ohm for internal PHYs)
+
+  mdio:
+    $ref: /schemas/net/mdio.yaml#
+    unevaluatedProperties: false
+    description:
+      Define the absolute address of the internal PHY for each port.
+
+$ref: dsa.yaml#
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    mdio {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        switch@1 {
+            compatible = "airoha,an8855";
+            reg = <1>;
+            reset-gpios = <&pio 39 0>;
+
+            airoha,ext-surge;
+
+            #nvmem-cell-cells = <0>;
+
+            nvmem-layout {
+                compatible = "fixed-layout";
+                #address-cells = <1>;
+                #size-cells = <1>;
+
+                shift_sel_port0_tx_a: shift-sel-port0-tx-a@c {
+                    reg = <0xc 0x4>;
+                };
+
+                shift_sel_port0_tx_b: shift-sel-port0-tx-b@10 {
+                    reg = <0x10 0x4>;
+                };
+
+                shift_sel_port0_tx_c: shift-sel-port0-tx-c@14 {
+                    reg = <0x14 0x4>;
+                };
+
+                shift_sel_port0_tx_d: shift-sel-port0-tx-d@18 {
+                    reg = <0x18 0x4>;
+                };
+
+                shift_sel_port1_tx_a: shift-sel-port1-tx-a@1c {
+                    reg = <0x1c 0x4>;
+                };
+
+                shift_sel_port1_tx_b: shift-sel-port1-tx-b@20 {
+                    reg = <0x20 0x4>;
+                };
+
+                shift_sel_port1_tx_c: shift-sel-port1-tx-c@24 {
+                    reg = <0x24 0x4>;
+                };
+
+                shift_sel_port1_tx_d: shift-sel-port1-tx-d@28 {
+                    reg = <0x28 0x4>;
+                };
+
+                shift_sel_port2_tx_a: shift-sel-port2-tx-a@2c {
+                    reg = <0x2c 0x4>;
+                };
+
+                shift_sel_port2_tx_b: shift-sel-port2-tx-b@30 {
+                    reg = <0x30 0x4>;
+                };
+
+                shift_sel_port2_tx_c: shift-sel-port2-tx-c@34 {
+                    reg = <0x34 0x4>;
+                };
+
+                shift_sel_port2_tx_d: shift-sel-port2-tx-d@38 {
+                    reg = <0x38 0x4>;
+                };
+
+                shift_sel_port3_tx_a: shift-sel-port3-tx-a@4c {
+                    reg = <0x4c 0x4>;
+                };
+
+                shift_sel_port3_tx_b: shift-sel-port3-tx-b@50 {
+                    reg = <0x50 0x4>;
+                };
+
+                shift_sel_port3_tx_c: shift-sel-port3-tx-c@54 {
+                    reg = <0x54 0x4>;
+                };
+
+                shift_sel_port3_tx_d: shift-sel-port3-tx-d@58 {
+                    reg = <0x58 0x4>;
+                };
+            };
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+                    label = "lan1";
+                    phy-mode = "internal";
+                    phy-handle = <&internal_phy1>;
+                };
+
+                port@1 {
+                    reg = <1>;
+                    label = "lan2";
+                    phy-mode = "internal";
+                    phy-handle = <&internal_phy2>;
+                };
+
+                port@2 {
+                    reg = <2>;
+                    label = "lan3";
+                    phy-mode = "internal";
+                    phy-handle = <&internal_phy3>;
+                };
+
+                port@3 {
+                    reg = <3>;
+                    label = "lan4";
+                    phy-mode = "internal";
+                    phy-handle = <&internal_phy4>;
+                };
+
+                port@5 {
+                    reg = <5>;
+                    label = "cpu";
+                    ethernet = <&gmac0>;
+                    phy-mode = "2500base-x";
+
+                    fixed-link {
+                        speed = <2500>;
+                        full-duplex;
+                        pause;
+                    };
+                };
+            };
+
+            mdio {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                internal_phy1: phy@1 {
+                    reg = <1>;
+
+                    nvmem-cells = <&shift_sel_port0_tx_a>,
+                                  <&shift_sel_port0_tx_b>,
+                                  <&shift_sel_port0_tx_c>,
+                                  <&shift_sel_port0_tx_d>;
+                    nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+                };
+
+                internal_phy2: phy@2 {
+                    reg = <2>;
+
+                    nvmem-cells = <&shift_sel_port1_tx_a>,
+                                  <&shift_sel_port1_tx_b>,
+                                  <&shift_sel_port1_tx_c>,
+                                  <&shift_sel_port1_tx_d>;
+                    nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+                };
+
+                internal_phy3: phy@3 {
+                    reg = <3>;
+
+                    nvmem-cells = <&shift_sel_port2_tx_a>,
+                                  <&shift_sel_port2_tx_b>,
+                                  <&shift_sel_port2_tx_c>,
+                                  <&shift_sel_port2_tx_d>;
+                    nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+                };
+
+                internal_phy4: phy@4 {
+                    reg = <4>;
+
+                    nvmem-cells = <&shift_sel_port3_tx_a>,
+                                  <&shift_sel_port3_tx_b>,
+                                  <&shift_sel_port3_tx_c>,
+                                  <&shift_sel_port3_tx_d>;
+                    nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+                };
+            };
+        };
+    };